Cantilever umbrella



FIG. 1 is a front view of a cantilever umbrella.

FIG. 2 is a perspective view thereof.

FIG. 3 is a right side view thereof and the left side view being a mirror image thereof.

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The broken lines depict portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a cantilever umbrella, as shown and described. 